SCALO - SCALOGRAM ANALYSIS, Ver. 3.1
By Andrew Gilpin
Modified By Ron D. Hays
Distributed by the National Collegiate Software Clearinghouse
Number of Stimuli = 9
Number of Subjects = 2829
Data from FILE 'gutt.DAT'
SUMMARY
Items in Original order:
Item # #Passing Difficulty
====== ======= ==========
1 998 0.35
2 1548 0.55
3 1377 0.49
4 2038 0.72
5 2382 0.84
6 2131 0.75
7 2023 0.72
8 2384 0.84
9 2581 0.91
Items arranged by difficulty:
Item # #Passing Difficulty
====== ======= ==========
9 2581 0.91
8 2384 0.84
5 2382 0.84
6 2131 0.75
4 2038 0.72
7 2023 0.72
2 1548 0.55
3 1377 0.49
1 998 0.35
Summary Reliability Statistics:
Split-Half (Odd-Even) Reliability:
Original: R = 0.858
Estimated(SP-BRN) R = 0.924
Guttman Reliability R = 0.922
Kuder-Richardson 20 R = 0.893
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Coefficient of Reproducibility = 0.929
Minimum Marginal Reproducibility = 0.721
Percent Improvement = 0.208
Coefficient of Scalability = 0.747
Proportion with Perfect Guttman Pattern = 0.719